21241200043980 has 168 divisors, whose sum is σ = 76433355587232. Its totient is φ = 4855131415296.

The previous prime is 21241200043979. The next prime is 21241200044087. The reversal of 21241200043980 is 8934000214212.

21241200043980 is a `hidden beast` number, since 2 + 1 + 24 + 120 + 0 + 0 + 439 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 103960257 + ... + 104164376.

It is an arithmetic number, because the mean of its divisors is an integer number (454960449924).

Almost surely, 2^{21241200043980} is an apocalyptic number.

21241200043980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21241200043980 is an abundant number, since it is smaller than the sum of its proper divisors (55192155543252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21241200043980 is a wasteful number, since it uses less digits than its factorization.

21241200043980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208124667 (or 208124650 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 21241200043980 in words is "twenty-one trillion, two hundred forty-one billion, two hundred million, forty-three thousand, nine hundred eighty".